I have a sharp sx-9700 home stereo amp that has one burned out stk4048ll I was wondering if it would be any kind of gain in power by using the STK4050ll chip.
Either is difficult to obtain, if the voltages match, just get what is available from a reliable source.
Bear in mind the STK series is out of production for many years, mostly Chinese copies, rarely NOS / pulls are available. they were known for a higher than expected failure rate if there was a fault elsewhere in the circuit.
I would hack it to a transistor based PCB, as the supply is typically +/- 60V, 7293 will not work, and 498xx are also out of production.
Bear in mind the STK series is out of production for many years, mostly Chinese copies, rarely NOS / pulls are available. they were known for a higher than expected failure rate if there was a fault elsewhere in the circuit.
I would hack it to a transistor based PCB, as the supply is typically +/- 60V, 7293 will not work, and 498xx are also out of production.
So from what I understand the Chinese versions are just not as reliable correct? Also the voltage requirements for the stk4050 is like 10 to 15 more volts. The stk4048 is a 150w chip and the stk4050 is a 200w chip
There are local amps made here in India using Chinese STK4141, reliable enough, UNLESS you change the volume very fast!
The other part numbers are usually not available here, and there are good to very bad versions made in China.
Which is why I said reliable source, and best put a transistor version, here the stereo board is about $18, 30-0-30 supply.
60-0-60 versions may be available at a higher price.
Bear in mind that STK modules were also made for TV SMPS, motor speed control and other applications, and many versions like 4141, 4141-II, 4141X and others exist within the same package.
The other part numbers are usually not available here, and there are good to very bad versions made in China.
Which is why I said reliable source, and best put a transistor version, here the stereo board is about $18, 30-0-30 supply.
60-0-60 versions may be available at a higher price.
Bear in mind that STK modules were also made for TV SMPS, motor speed control and other applications, and many versions like 4141, 4141-II, 4141X and others exist within the same package.
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You might look for Class D modules as well, suitable ones may be available.
Check the actual supply volts, and look for one with a slightly higher rating.
Check the actual supply volts, and look for one with a slightly higher rating.
So i believe my power output is around 60 to 65 volts it originally had the STK 4048ll chips I believe the STK 4050 requires like 20 more volts to operate at normal power would it be worth it to try or would it just put a strain on the power supply
Check the data sheet, output to voltage graphs should be there.
The quality of the replacement must be good. Bad STK are known to take out speakers and transformers. Part of the reason I advised alternate circuits.
Again, I found alternates, Class D modules, waterproof, $10 or so. Transistors based circuits also.
Use the search term '60-0-60 V amplifier board', or change it to "amplifier module 60-0-60V', you will get many choices.
The quality of the replacement must be good. Bad STK are known to take out speakers and transformers. Part of the reason I advised alternate circuits.
Again, I found alternates, Class D modules, waterproof, $10 or so. Transistors based circuits also.
Use the search term '60-0-60 V amplifier board', or change it to "amplifier module 60-0-60V', you will get many choices.
Here are the data sheets. I believe the STK 4050 would work everything looks identical except for the slight voltage difference in the 4050. I just want to know if it will be safe to run I believe I have two good STK 4050s that are not counterfeit they weigh in at 50 g nearly each I just want to know if they will be okay and still output good power maybe slightly more per channel as I stated before I believe my transformer voltage is a 60-0-60